Extrusion molding apparatus and manufacturing method for green honeycomb molded body using same
AssigneeSumitomo Chemical Company, Limited
InventorsTeruo Komori, Hajime Yoshino
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Abstract
The extrusion-molding device of the invention is for producing a green honeycomb molded body with a cell structure, and the device includes a housing, a screw, a die with slits, a resistance tube and a fragmenting board having through-passages through which a raw material composition passes from the upstream end side to the downstream end side. The through-passages of the fragmenting board have upstream channels composed of a plurality of flow passages extending downstream from the upstream end side, and downstream channels extending up to the downstream end side and having flow passage cross-sectional shapes different from those of the upstream channels.
Claims13
An extrusion-molding device for producing a green honeycomb molded body with a cell structure, the device comprising:
- a housing with a flow passage for transporting a paste raw material composition;
- a screw provided upstream of the flow passage for kneading the raw material composition and transporting it downstream;
- a die provided downstream of the flow passage and having slits corresponding to the shape of the cell structure of the green honeycomb molded body;
- a resistance tube for connecting the flow passage and the die;
- and
- a fragmenting board provided between the screw and the die, having through-passages through which the raw material composition passes from an upstream end side to a downstream end side thereof,
- wherein the through-passages comprise:
- upstream channels composed of a plurality of flow passages extending downstream from the upstream end side of the fragmenting board;
- and
- downstream channels extending up to the downstream end side of the fragmenting board and having flow passage cross-sectional shapes different from those of the upstream channels,
- wherein the upstream channels are composed of a plurality of flow passages extending downstream essentially straight from the upstream end side of the fragmenting board, while the downstream channels are composed of slits forming a pattern identical or similar to the die slits.
An extrusion-molding device for producing a green honeycomb molded body with a cell structure, the device comprising:
- a housing with a flow passage for transporting a paste raw material composition;
- a screw provided upstream of the flow passage for kneading the raw material composition and transporting it downstream;
- a die provided downstream of the flow passage and having slits corresponding to the shape of the cell structure of the green honeycomb molded body;
- a resistance tube for connecting the flow passage and the die;
- and
- a fragmenting board provided between the screw and the die, having through-passages through which the raw material composition passes from an upstream end side to a downstream end side thereof,
- wherein the through-passages comprise:
- upstream channels composed of a plurality of flow passages extending downstream from the upstream end side of the fragmenting board;
- and
- downstream channels extending up to the downstream end side of the fragmenting board and having flow passage cross-sectional shapes different from those of the upstream channels,
- wherein the upstream channels are composed of a plurality of flow passages extending downstream essentially straight from the upstream end side of the fragmenting board, and the downstream channels are composed of a plurality of slits each connected to the plurality of flow passages.
Dependencies are inferred from the claim text.